A storm with wind gusting to 76 mph dumped hail and more than 3 inches of rain on Tucson, causing flash floods that killed at least one person and left 11 motorists stranded in raging waters.
The storm that spun off Hurricane Flossie struck during the afternoon rush hour.
The storm also knocked out power to wide area in and around the city, the Tucson Electric Power Co. said.
The Tucson motorist killed had tried to drive through floodwater and was swept into a small canyon. Normally dry desert areas were full to the brim.
The fate of the 11 motorists was not immediately clear.